+ system service that may be used to synchronize the
+ local system clock with a remote Network Time Protocol
+ server. It also saves the local time to disk every
+ time the clock has been synchronized and uses this to
+ possibly advance the system realtime clock on
+ subsequent reboots to ensure it
+ monotonically advances even if the system lacks a
+ battery-buffered RTC chip.</para>
+
+ <para>The NTP servers contacted are determined from
+ the global settings in
+ <citerefentry><refentrytitle>timesyncd.conf</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
+ the per-link static settings in
+ <filename>.network</filename> files, and the per-link
+ dynamic settings received over DHCP. See
+ <citerefentry><refentrytitle>systemd.network</refentrytitle><manvolnum>5</manvolnum></citerefentry>
+ for more details.</para>
+ </refsect1>
+
+ <refsect1>
+ <title>Files</title>
+
+ <variablelist>
+ <varlistentry>
+ <term><filename>/var/lib/systemd/clock</filename></term>
+
+ <listitem>
+ <para>This file contains the timestamp of last
+ successful synchronization.</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>